P0305
Cylinder 5 Misfire Detected
System: Ignition
Severity: medium
What does P0305 mean?
The DTC P0305 (Cylinder 5 Misfire Detected) is a fault code stored by the ECU when it detects a misfire cyl 5 condition in the ignition subsystem. It is commonly seen on European and Asian vehicles using Bosch, Continental, Siemens or Denso ECUs.
Common causes of P0305
- Coil/plug cyl 5
- Injector
- Low compression
- Valve issue
How to fix P0305
Swap diagnosis + leakdown test. Inline-5s/6s often have cyl 5/6 misfires from rear coil heat soak.
Tuning approach with DaVinci Deluxe
For P0305, DaVinci Deluxe offers the following ECU map adjustments and software solutions:
- Per-cylinder fuel trim
- Per-cyl ignition tune
Need to fix P0305 on your ECU?
DaVinci Deluxe is professional ECU tuning software trusted by 800+ workshops. Lifetime license €299, 10 minutes free trial.
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